Click on map to open large map in new window (Map updated: 11 August 2009)

Click here to view an interactive map of the Northern Ireland dataset as currently collated by CEDaR.The map is generated through the NBN Gateway using their Interactive Mapping Tool.

Surprisingly rare in Ireland, this lichen is a character species of nutrient-rich boundary trees. The grey, granular thallus has a distinctive green cast (best seen by stepping back from the tree to view) and numerous large, flat discs (>1mm diam.) with generously notched margins. In Ireland it has been recorded from Counties Cork, Laois, Offaly, Kildare and Fermanagh with earlier records from Counties Galway and Waterford. It is probably much overlooked.

Key characteristics

A species of large, old, rough-barked, boundary trees; thallus grey with a green glow